There was a large session on methane at the last Goldschmidt Conf this Aug. http://www.goldschmidt2011.org/program/programView?period=17c&pdf=1 numerous methane papers in other sessions can be found by searching "methane" at: http://www.goldschmidt2011.org/abstracts/abstractSearch e.g., http://www.goldschmidt2011.org/abstracts/finalPDFs/2035.pdf I did not attend the session, but did briefly talk to Bill Reeburgh who gave the keynote, and if I remember correctly he seemed quite adamant that natural methane oxidation would be more than adequate to handle future marine methane releases. In any case he wrote a major review on marine methane: http://pubs.acs.org/doi/abs/10.1021/cr050362v that is likely required reading. My own view is that the difficulties of CO2 mitigation will likely pale in comparison to attempts to safely mitigate methane above that naturally possible, but happy to have someone disprove that hypothesis. Good luck. -Greg
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